public abstract class Minimax extends CollatingFunction
| Modifier and Type | Field and Description |
|---|---|
static int |
MAX |
static int |
MIN |
staticCollationoperationargumentEFFECTIVE_BOOLEAN_VALUE, EVALUATE_METHOD, EVENT_FEED_METHOD, INHERITED_CONTEXT, INSPECTION_CONTEXT, ITEM_FEED_METHOD, ITERATE_METHOD, locationId, MAX_SEQUENCE_LENGTH, MAX_STRING_LENGTH, NAVIGATION_CONTEXT, NODE_VALUE_CONTEXT, PROCESS_METHOD, PUSH_SELECTION, staticProperties, UNBOUNDED_LOWER, UNBOUNDED_UPPER, W3C_CONSUMING, W3C_FREE_RANGING, W3C_GROUP_CONSUMING, W3C_MOTIONLESS, WATCH_METHOD| Constructor and Description |
|---|
Minimax() |
| Modifier and Type | Method and Description |
|---|---|
void |
checkArguments(ExpressionVisitor visitor)
Static analysis: prevent sorting of the argument and preallocate a comparer if possible
|
int |
computeCardinality()
Determine the cardinality of the function.
|
Expression |
copy()
Copy an expression.
|
boolean |
equals(Object o)
Determine whether two expressions are equivalent
|
AtomicValue |
evaluateItem(XPathContext context)
Evaluate the function
|
BuiltInAtomicType |
getArgumentType() |
AtomicComparer |
getAtomicComparer(XPathContext context) |
protected int |
getCollationArgument()
Get the argument position (0-based) containing the collation name
|
AtomicComparer |
getComparer() |
ExpressionCompiler |
getExpressionCompiler()
Return the compiler of the Minimax expression
|
int |
getImplementationMethod()
Get implementation method
|
ItemType |
getItemType(TypeHierarchy th)
Determine the item type of the value returned by the function
|
MinimaxAdjunct |
getStreamingAdjunct()
Get a class that supports streamed evaluation of this expression
|
boolean |
isIgnoreNaN()
Test whether NaN values are to be ignored
|
static AtomicValue |
minimax(SequenceIterator iter,
int operation,
AtomicComparer atomicComparer,
boolean ignoreNaN,
XPathContext context)
Static method to evaluate the minimum or maximum of a sequence
|
Expression |
optimize(ExpressionVisitor visitor,
ExpressionVisitor.ContextItemType contextItemType)
Perform optimisation of an expression and its subexpressions.
|
void |
setIgnoreNaN(boolean ignore)
Indicate whether NaN values should be ignored.
|
Expression |
typeCheck(ExpressionVisitor visitor,
ExpressionVisitor.ContextItemType contextItemType)
Type-check the expression
|
bindStaticContext, expandCollationURI, getAtomicComparer, getCollator, getCollatorFromLastArgument, getExpressionBaseURI, getPreAllocatedAtomicComparer, getStaticCollation, preAllocateCompareraddContextDocumentArgument, addDocToPathMap, computeSpecialProperties, equalOrNull, getContextNode, getConvertingCallable, getDefaultArgumentNode, getDetails, getErrorCodeForTypeErrors, getFunctionItemType, getOperation, getRequiredType, iterateSubExpressionInfo, makeSystemFunction, setDetails, useContextItemAsDefaultaddExternalFunctionCallToPathMap, checkArgumentCount, explain, getArguments, getDisplayName, getExpressionName, getFunctionName, getNumberOfArguments, hashCode, iterateSubExpressions, preEvaluate, promote, replaceSubExpression, setArguments, setFunctionName, simplify, simplifyArguments, toStringaddToPathMap, adoptChildExpression, checkForUpdatingSubexpressions, checkPermittedContents, computeDependencies, computeStaticProperties, doPromotion, dynamicError, effectiveBooleanValue, evaluateAsString, evaluatePendingUpdates, explain, getCardinality, getColumnNumber, getColumnNumber, getConstructType, getContainer, getDependencies, getEvaluationMethod, getExecutable, getHostLanguage, getIntegerBounds, getIntrinsicDependencies, getLineNumber, getLineNumber, getLocationId, getLocationProvider, getObjectName, getProperties, getProperty, getPublicId, getSlotsUsed, getSpecialProperties, getStreamability, getSystemId, getSystemId, hasVariableBinding, implementsStaticTypeCheck, isSubtreeExpression, isUpdatingExpression, isVacuousExpression, iterate, iterateEvents, markTailFunctionCalls, process, resetLocalStaticProperties, setContainer, setEvaluationMethod, setFiltered, setFlattened, setLocationId, staticTypeCheck, suppressValidation, toPattern, toStreamingPattern, typeErrorpublic static final int MIN
public static final int MAX
protected int getCollationArgument()
getCollationArgument in class CollatingFunctionpublic void setIgnoreNaN(boolean ignore)
ignore - true if NaN values are to be ignored when computing the min or max.public boolean isIgnoreNaN()
public AtomicComparer getComparer()
public BuiltInAtomicType getArgumentType()
public int getImplementationMethod()
getImplementationMethod in class SystemFunctionCallpublic void checkArguments(ExpressionVisitor visitor) throws XPathException
checkArguments in class CollatingFunctionvisitor - the expression visitorXPathException - if the arguments are incorrectpublic int computeCardinality()
computeCardinality in class SystemFunctionCallStaticProperty.ALLOWS_ZERO_OR_ONE,
StaticProperty.EXACTLY_ONE, StaticProperty.ALLOWS_ONE_OR_MORE,
StaticProperty.ALLOWS_ZERO_OR_MOREpublic Expression typeCheck(ExpressionVisitor visitor, ExpressionVisitor.ContextItemType contextItemType) throws XPathException
typeCheck in class FunctionCallvisitor - an expression visitorcontextItemType - the static type of "." at the point where this expression is invoked.
The parameter is set to null if it is known statically that the context item will be undefined.
If the type of the context item is not known statically, the argument is set to
Type.ITEM_TYPEXPathException - if an error is discovered during this phase
(typically a type error)public Expression optimize(ExpressionVisitor visitor, ExpressionVisitor.ContextItemType contextItemType) throws XPathException
This method is called after all references to functions and variables have been resolved to the declaration of the function or variable, and after all type checking has been done.
optimize in class SystemFunctionCallvisitor - an expression visitorcontextItemType - the static type of "." at the point where this expression is invoked.
The parameter is set to null if it is known statically that the context item will be undefined.
If the type of the context item is not known statically, the argument is set to
Type.ITEM_TYPEXPathException - if an error is discovered during this phase
(typically a type error)public ItemType getItemType(TypeHierarchy th)
getItemType in class SystemFunctionCallth - the type hierarchy cachepublic Expression copy()
copy in class CollatingFunctionpublic boolean equals(Object o)
equals in class CollatingFunctionpublic AtomicValue evaluateItem(XPathContext context) throws XPathException
evaluateItem in class Expressioncontext - The context in which the expression is to be evaluatedXPathException - if any dynamic error occurs evaluating the
expressionpublic AtomicComparer getAtomicComparer(XPathContext context) throws XPathException
XPathExceptionpublic static AtomicValue minimax(SequenceIterator iter, int operation, AtomicComparer atomicComparer, boolean ignoreNaN, XPathContext context) throws XPathException
iter - Iterator over the input sequenceoperation - either MIN or MAXatomicComparer - an AtomicComparer used to compare valuesignoreNaN - true if NaN values are to be ignoredcontext - dynamic evaluation contextXPathException - typically if non-comparable values are found in the sequencepublic ExpressionCompiler getExpressionCompiler()
getExpressionCompiler in class Expressionpublic MinimaxAdjunct getStreamingAdjunct()
getStreamingAdjunct in class ExpressionCopyright (c) 2004-2013 Saxonica Limited. All rights reserved.